BRAND: Communica

A3144 Hall Sensor On Breakout Board. 4,5 V to 24 V Operation. 25MA Open-Collector Output. Remove Resistor R1 if using with a Microcontroller

A3144 Hall Sensor On Breakout Board


The A3144 is an Hall effect latched sensor. That's nice but what does it do? Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size. A hall effect sensor is much smaller, but can handle less current than a reed switch.

The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open-collector output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.

If a magnetic flux density larger than the threshold, DO is turned on (low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high).

The Hall Magnetic Sensor consists of a 3144EUA-S sensitive Hall-effect switch for high-temperature operation, a 680Ω resistor and a LED. Compatible with popular electronics platforms like Arduino and Raspberry Pi.


  • Superior temperature resilience. Suitable for automotive or industrial applications
  • 4.5 V to 24 V Operation
  • Open-Collector 25mA output
  • Reverse battery protection
  • Activate with small, commercially available permanent magnets
  • Solid-State reliability
  • Small size
  • Resistant to physical stress

Additional Information

Device Breakout Board
Type A3144 | Hall | Sensor